A conductivity meter is a device used to measure the electrical conductivity of a solution, which indicates how well the solution can conduct electricity. This property is influenced by the presence of ions, such as salts and minerals, in the solution. Conductivity meters are commonly used in various fields, including environmental monitoring, aquaculture, and water quality testing. These meters typically consist of two electrodes that are immersed in the solution. When an electrical current passes through the solution, the meter calculates the conductivity based on the current flow and the solution's temperature. This information helps assess the concentration of dissolved substances in the liquid.